Frosty Field and Morning Sunlight
January 11, 2013
Photographer: Piero Armando
Summary Author: Piero Armando; Jim Foster
The photo above shows the effects of sunlight and shade on a
frosty soccer field in Turin, Italy. As two local teams took the field on a
chilly December morning (temperature of 27 F or -3 C), they had to contend with
an overnight deposit of frost. Heat loss from radiational cooling at night causes
objects such as grassy surfaces to become colder than the surrounding air. Frost
(the solid deposition of water vapor) will then form if the surface is below
the frost point. Unless it was protected by the cooling shadows of nearby
buildings the frost on this soccer field quickly disappeared in the warm
sunshine (sensible heat). Photo taken on December 9, 2012.
Photo details: Camera Maker: Canon; Camera Model: Canon EOS 600D; Lens: EF-S18-55mm f/3.5-5.6 IS II; Focal Length: 55mm; Aperture: f/8.0; Exposure Time: 0.0050 s (1/200); ISO equiv: 400; Software: Adobe Photoshop 7.0.